Hi PaQ, wow that looks great, hard to believe that's just the working view! :)

The Options > View > 3D View angles dialog does give you control over the rotation and the field of view.

But it may be easier to set up with 2 points instead of angles, like a "Camera point" and a "look at point". Are you able to get that information? If so then it should be possible to set up a script that does that.

The field of view in that dialog though is not specifically horizontal, it's the field of view of the center square of the viewport.

But if you can let me know if you are able to get a camera and look at point, that would probably be easiest for orientation, let me know.

- Michael